Study On Population Ecology Of Anopheles Mosquitoes And Their Related Factors In Liaoning Province, China

ObjectiveTo master the population composition, density, seasonal fluctuation and the primary peak of blood-sucking of the Anopheles mosquitoes in Liaoning Province, so as to provide scientific evidence for controlling the vector of malaria.MethodsThree surveillance methods, such as light trap, resting mosquito collection and human baited bed net were adopted to study the ecological habit of the Anopheles mosquitoes. PCR method was applied to study the population composition of the Anopheles mosquitoes. Multiplex PCR was adopted to study the origin of the blood meal of An. lesteri.ResultsAn. lesteri and An. sinensis were the most prevalent Anopheles species in Liaoning Province; the northern boundary of An. lesteri in China had already moved to the Tieling City in Liaoning Province and was located in the latitude of43°26’. The seasonal density peak of An. lesteri in Liaoning Province are from July to September, and showed the consistent trend with malaria incidence rate. Though An. lesteri suck both cattle and human blood, however, the human blood index was not more than1%.21:00-23:00was the primary peak of blood-sucking female An. lesteri. The density peak of An.sinensis was from July to September, and19:00-22:00was the primary peak of blood-sucking female An. sinensis.ConclusionAs the main vectors of malaria, An. lesteri and An. sinensis are widely distributed in Liaoning Province, with a high density. An. lesteri has the potential of transmitting malaria because of its partial human blood preference. Based on the findings metioned above, the study of transmitting ability of the Anopheles mosquitoes should be strenghted, and we should expore the effective vector control methods to minimize the risk of malaria transmission, and eliminate the malaria in Liaoning Province ultimately.